Which of the Following Examples of Teaching a Child to Play

Which of the following examples of teaching a child to play tennis describes the technique of chaining in operant conditioning?

A) Reinforcing her for effort,and then pulling away from reinforcement once the child is skilled enough to play the complete game of tennis
B) Reinforcing her for effort and not performance,until the child is confident enough to play the complete game of tennis
C) Providing reinforcement every time the child hits the ball over the net until the child can play the complete game of tennis
D) Providing reinforcement in steps for learning to serve,volley,and use the forehand and backhand until the child can play the complete game of tennis